- Company number
- 09624581
- Incorporated
- 4 Jun 201511 years trading
- Registered office
- 9 Steerforth Close, Rochester, ME1 2JD
- Nature of business
- Construction of commercial buildings; Other construction installation
Iso Duct Limited is a 11-year-old private limited company registered in Rochester, company number 09624581, one of 169 building contractors in Rochester. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £11K (+11.4%) on the year before, to £106K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £148K against £47K owed within a year: 3.1 times cover.
- 4 employees on average, up from 3 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £106K | £17K | £148K | £47K | 4 |
| 30 Jun 2024 | £95K | £29K | £147K | £49K | 3 |
| 30 Jun 2023 | £104K | £145K | £208K | £82K | 3 |
| 30 Jun 2022 | £72K | £56K | £199K | £96K | 3 |
| 30 Jun 2021 | £90K | £120K | £247K | £108K | 4 |
| 30 Jun 2020 | £61K | £117K | |||
| 30 Jun 2019 | £74K | £129K | |||
| 30 Jun 2018 | £57K | £153K | |||
| 30 Jun 2017 | £62K | £102K | £204K | £142K | 2 |
| 30 Jun 2016 | £38K | £84K | £144K | £106K |
Who runs and owns Iso Duct Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| P*** K*** | Director | Jun 2015 |
| M*** Z*** | Director | Jun 2015 |
| M*** Z*** | Secretary | Jun 2015 |
People with significant control (2)
Where Iso Duct Limited is registered
The registered office is in Rochester (ME1), in the Medway local authority area, South East. Show ME1 2JD on a map.
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- Liyah Properties LimitedProperty developers
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- Lilyeuk LtdMotor traders
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What happens if Iso Duct Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 09624581
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 June 2015 (11 years ago)
- Registered office
- 9 Steerforth Close, Rochester, ME1 2JD
- Nature of business
- Construction of commercial buildings (SIC 41201)
Other construction installation (SIC 43290) - Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 4 June 2026
- Previous names
- Iso Duck Limited (until 22 Jun 2015)
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Rochester
Other active building contractors registered in Rochester.
- J D Harper Construction Limited2024
- J Fairbairn Building Service Ltd2025
- Jaggi Build Co Limited2026
- JNB Painting and Building Services Ltd2025
- John London Limited2025
- JSB Groundworks Limited2014
- KDRB Ltd2026
- Kent and Essex Garden Rooms Limited2025
All building contractors in Rochester · All trades in Rochester · Builders across the UK
Frequently asked questions
When are Iso Duct Limited's accounts due?
Iso Duct Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Iso Duct Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Iso Duct Limited still trading?
Iso Duct Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Iso Duct Limited do?
Iso Duct Limited is registered under Construction of commercial buildings (SIC 41201); Other construction installation (SIC 43290).
How old is Iso Duct Limited?
Iso Duct Limited was incorporated on 4 June 2015, 11 years ago.
Who runs Iso Duct Limited?
Iso Duct Limited has 2 active directors, the longest-serving appointed in Jun 2015. Their names and service addresses are on the Companies House register.
Who owns Iso Duct Limited?
2 people or companies have significant control of Iso Duct Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Iso Duct Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Iso Duct Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.